Test Bank For Biology: A Global Approach, 12th Edition by Neil A. Campbell
Test bank University of Queensland GENES, CELLS & EVOLUTION 2024 / midterm exam study guide / from: Biology 12th - A Global Approach Campbell
Summary Genes, Cells & Evolution University of Queensland 2024 - All lectures week 1 - 12, all college notes, lots of visuals, exam test questions - 150 pages!
All for this textbook (39)
Written for
Universiteit Leiden (UL)
Biologie
Chemie Van Het Leven
All documents for this subject (5)
Seller
Follow
IlseVerkerk18
Content preview
Samenvatting Biology Campbell H2
Atoms and Molecules
Concept 2.1: matter consists of chemical elements in pure form and in combinations
called compounds
Organisms are composed of matter; anything that takes up space and had
mass. Matter is made up of elements.
Elements: substance that cannot be broken down to other substances.
Compound: substance consisting of two or more different elements combined in
a fixed ratio.
Essential elements: 20-25% of all the 92 natural elements, an organism needs
these to have a healthy life and to reproduce. Along organisms the variation of
these essential elements is different.
Trace elements: also known as microminerals, are substances that make up less
than 0.01% of the body mass.
Concept 2.2: an element’s properties depend on the structure of its atoms
Each element consists of a certain type of
atom that is different from the atoms of any
other elements.
Atom: the smallest unit of matter that still
retains the properties of an element
Subatomic particles: neutrons (electrically
neutral), protons, electrons
Atomic nucleus: protons and neutrons are
packed together in the centre of an atom
Electrons: form a “cloud” of negative charge
around the nucleus
Neutron and proton are almost identical in mass (1,7 x 10 -24 gram). Grams are
not very useful for describing the mass of objects that are so minuscule. So, we
use a unit of measurement called Dalton. Neutrons/protons have masses close
to 1 Dalton. The mass of electrons is 1/2000 of a neutron/proton, so we can
ignore when computing the total mass of an atom.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller IlseVerkerk18. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $3.21. You're not tied to anything after your purchase.